Speaker



FIG. 1 is a perspective view of the front, top and left side of a speaker showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom view thereof.

Broken lines are used to show portions of the speaker that are not being claimed, and thus form no part of the claimed design. 

CLAIM The ornamental design for a speaker, as shown and described. 